Use after deleting a feature, function, component, validation rule, config flag, enum value, status, or any symbol — frontend or backend — to find the downstream artifacts the deletion orphaned. Covers orphaned string keys in object/label/i18n maps, user-facing copy, OpenAPI enums, dead branches, now-unused imports/props, stale comments, and test fixtures that lint and code review miss. Trigger when you removed code and want a clean, zero-dead-code diff.